Man-hole for sewers or cesspools



(No Model.)

J. WALLACE. MAN HOLE FOR SBWERS 0R GESSPOOLS.

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y iU E -STATE PATENT OFFICE.

JOHN WALLAoE, 0F}

TROY, NEVV YORK.

' SPECIFICATION forming part of Letters Patent No. 423,501, dated March 18, 1890.

Application filed August 21, 1889- To all whom it may concern.-

Be it known that 1, JOHN WALLACE, of the city of Troy, county of Rensselaer, and State of New York, have invented a new and useful Improvement in Man l-loles for Sewers and Oesspools, of which the following is a specification.

My invention relates to a new form of brick for use in constructing man-holes for sewers and cesspools; and the purposesof my invention are to make these circular openings more durable, to render them tight, and. to better condition them to resist the action of frost.

As heretofore produced, sewer and cesspool man-holes have been laid up in a circular form by means of bricks laid in courses with their ends forming the inner surface of the opening. Thus made with the bricks radially placed with their ends facing inwardly there were from necessity angular-form goreshaped places between the outer ends of the brick that were filled with cement-mortar and which, when acted upon by lateral pressure and by frost, tended to break the bond, and the brick gradually loosened and were forced inwardly. To remedy these difficulties, I make bricks in a segment form, so far as their sides are concerned, with ends of the bricks where they abut to form a circle in radial coincidence, and at each end of in the tops of the bricks form agroove, with a sink made in the inner end of the latter, in which groove is placed a dog or binder arranged at each ofits opposite ends to hook into't-he sink made in the groove or engage the registering grooves of each two bricks, and intermediately to rest in the groove of the abutting brick ends, and to form in the bottom of each brick a groove that will, as the bricks are laid to break joints in each course, be over the said dog or binding matelial to form a clinch to prevent lateral displacement.

Accompanying this specification, to form a part of it, there is a sheet of drawings containing five figures illustrating my invention, with the same designation of parts by letterreference used in all of them.

Of the illustrations, Figure 1 is a side elevation of a part of a sewer with a man-hole made according to my invention applied thereto. Fig. 2 is a section taken on the line as at of Fig. 1. Fig. 3 shows a top view of one of Serial No. 321,528. (No model.)

the bricks. Fig. at shows one .of the bricks turned over so as to bring what is its bottom face when in use turned uppermost in the illustration. Fig. 5 is aperspective of one of the dogs.

The several parts of the construction thus illustrated are designated by letter-reference and the function of the parts is described as follows:

The letters B designate the bricks, each of which is made with the groove or recess 9' in its upper surface at the ends, said grooves each having at their inner ends the sinks S.

, The letter 9 designates a groove made in what is the under surface of ,the bricks when laid, said groove 9 being made long enough to equal the length of the end grooves of each two of the bricks of a course, and so that when laid to break joints this groove g will be over the abutting grooves g'in the bricks of each course and cover the dog D, or take the binding material arranged therein. The dog D is made of metal and has the downcast ends 6, and is made of such a length that its ends will fit into the sinks of each-two bricks of a course, leaving room between their abutting ends for the mortar or cement.

The letter A designates the man hole, and

C the courses of brick; M, the mortarorcement; P, the cap, and O the-jman-hole cover.

The man-holeA consistsof a series of courses laid one above the other-in cement or mortar, with the segmental form bricks B of each course being made to break joints with those of the course below, with each of the bricks of a course connected by the dogs D,or binding material, and with the groove g in the bottom of each succeeding course being over the dog, and the grooves g of the abutting ends of each lower course, so that the binder in the said grooves g extending up into the grooves g of an upper course will form a bond therewith to prevent lateral movement or displacement.

While I prefer to use the dogs D to connect the bricks at the end of each course, yet, if desired, the bricks herein described may be laid withoutthe dogs by filling the grooves and sinks with cement, with eachof thecourses laid so as to break joints and with the sinks made in the bottom of each brick of acourse over the end grooves of each two bricks of the course beneath, the cement thus extending up into the grooves and down into thje end grooves-and sinks to form a bond between the courses.

Having thus described my in vention, what I claim, and desire to secure by Letters Patent,

1. The combination'of the bricks 13, made in a segmental form, and constructed with the grooves g, having sinks Sin their'upper surfaces at the ends, and the grooves 9 made in their bottom surfaces, of the dogs D, made with the downturned ends 6- adapted to connectwith said bricks, substantially in; the manner as and for the purposes set forth.

2. The combination, with the bricks B, made i in a segmental form, of the grooves g made with sinks arranged in the upper surface and August, 1889, and in the presence of the two witnesses whose names are hereto written.

JOHN WALLACE.

Witnesses:

W. E. HAGEN, I CHARLES S. BRINTNALL, 

